Photosynthesis produces carbon dioxide and oxygen.
a. true
b. false
Answer: b. false
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Horses and donkeys can mate successfully to produce mules, which are always sterile. Which genetic isolating mechanism prevents horses and donkeys from becoming a single species?
A) Hybrid infertility B) Mechanical isolation C) Behavioral isolation D) Temporal isolation E) Hybrid inviability
Organisms called ________ live on or in the body of a host and cause some degree of harm.
A. pathogens B. mesophiles C. commensals D. halophiles E. aerobes
Which one of the following initiates signal termination?
A. the shutdown of transcription B. the release of signal molecules from their receptors C. the shutdown of translation D. the reduction of signal amplification
While we can use molecular clocks based on molecular sequence data to estimate the times at which various lineages diverged, we ultimately need the ____ to calibrate the clocks
Fill in the blank with the appropriate word.